NASA astronaut Chris Williams speaks to students on the ham radio

iss074e0556775 (May 7, 2026) --- NASA astronaut and Expedition 74 flight engineer Chris Williams speaks to students on the ground using the International Space Station's ham radio. The ARISS, or Amateur Radio on the International Space Station, program gives students around the world the opportunity to talk directly with crew members aboard the orbital outpost, inspiring them to pursue careers in science, technology, engineering, and math. Credit: NASA/Chris Williams